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Madhurima Dutta 5Madhurima Dutta 5 

there has been an error, please try again-error

This error is coming when I am trying to refresh the page of Lightning Experience Rollout Specialist Badge.
Also, I have created a component TrailheaDX as part of Challenge 10, it's still showing couldn't find the Lightning Component.Please help
NagendraNagendra (Salesforce Developers) 
Hi Madhurima,

Sorry for this issue you are encountering.

May I suggest you please check with below links from the community which might help you further with the above issue. Please let us know if this helps.

Kindly mark this as solved if the information was helpful.